准备
- plasticity-blender-addon-Feature-Enhancements
- Quad Remesher for blender , https://www.exoside.com/quadremesherdata/QuadRemesher_1.2_UserDoc.pdf
步骤
- 连接刷新→三角refacet
- quad Remesher重拓扑
顶点颜色批量转材质
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTIBILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
bl_info = {
"name" : "VertexColor2Materials",
"author" : "Nolca",
"description" : "",
"blender" : (2, 80, 0),
"version" : (0, 0, 1),
"location" : "Properties > Render > My Awesome Panel",
"warning" : "",
"category" : "Mesh"
}
import bpy
import random
class PLASTICITY_PT_Panel_VC2M(bpy.types.Panel):
"""Creates a Panel in the Object properties window"""
bl_label = "Materials"
bl_space_type = 'VIEW_3D'
bl_region_type = 'UI'
bl_category = 'Plasticity'
def draw(self, context):
layout = self.layout
scene = context.scene
row = layout.row()
row.operator("materials.convert_to_materials")
class ConvertMaterialsOperator(bpy.types.Operator):
bl_idname = "materials.convert_to_materials"
bl_label = "顶点颜色转换为材质"
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(cls, context):
return any("plasticity_id" in obj.keys() and obj.type == 'MESH' for obj in context.selected_objects)
def execute(self, context):
prev_obj_mode = bpy.context.mode
for obj in context.selected_objects:
if obj.type != 'MESH':
continue
if not "plasticity_id" in obj.keys():
continue
mesh = obj.data
if "plasticity_id" not in obj.keys():
self.report(
{'ERROR'}, "Object doesn't have a plasticity_id attribute.")
return {'CANCELLED'}
bpy.context.view_layer.objects.active = obj
bpy.ops.object.mode_set(mode='OBJECT')
self.colorize_mesh(obj, mesh)
# vertex colors to mesh's material
return {'FINISHED'}
def colorize_mesh(self, obj, mesh):
groups = mesh["groups"]
face_ids = mesh["face_ids"]
if len(groups) == 0:
return
if len(face_ids) * 2 != len(groups):
return
if not mesh.vertex_colors:
mesh.vertex_colors.new()
color_layer = mesh.vertex_colors.active
group_idx = 0
group_start = groups[group_idx * 2 + 0]
group_count = groups[group_idx * 2 + 1]
face_id = face_ids[group_idx]
print(face_id,*face_ids)
color = generate_color_by_density(face_id)
for poly in mesh.polygons:
loop_start = poly.loop_start
if loop_start >= group_start + group_count:
group_idx += 1
group_start = groups[group_idx * 2 + 0]
group_count = groups[group_idx * 2 + 1]
face_id = face_ids[group_idx]
color = generate_color_by_density(face_id)
# Create a new material
mat = bpy.data.materials.new(name="M."+str(face_id))
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs[0].default_value = color
obj.data.materials.append(mat)
for loop_index in range(loop_start, loop_start + poly.loop_total):
color_layer.data[loop_index].color = color
# Apply the material to faces specified by loop_index
mesh.polygons[poly.index].material_index = len(obj.data.materials) - 1
# TODO
def generate_color_by_density(face_id):
return (random.random(), random.random(), random.random(), 1.0)
classes=(
PLASTICITY_PT_Panel_VC2M,
ConvertMaterialsOperator,
)
def register():
for i in classes:
bpy.utils.register_class(i)
def unregister():
for i in classes:
bpy.utils.unregister_class(i)
if __name__ == "__main__":
register()
def main():
# get the active object
obj = bpy.context.active_object
# get the vertex colors
vcol_layer = obj.data.vertex_colors.active
# get the mesh
mesh = bpy.context.object.data
print()
调试代码：了解polygons[index]的顺序
import bpy
def view_select():
for area in bpy.context.screen.areas:
if area.type == 'VIEW_3D':
break
# Set the context
override = bpy.context.copy()
override['area'] = area
override['region'] = area.regions[-1]
bpy.ops.view3d.view_selected(override,use_all_regions=False)
def select_face_by_index(obj, index):
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_all(action='DESELECT')
bpy.ops.object.mode_set(mode='OBJECT')
obj.data.polygons[index].select = True
bpy.ops.object.mode_set(mode='EDIT')
index=0
obj=bpy.context.active_object
try:
with open("index.txt", "r") as f:
index=int(f.read())
select_face_by_index(obj, index)
index+=1
with open("index.txt", "w") as f:
f.write(str(index))
view_select()
except:
with open("index.txt", "w") as f:
f.write('0')